1. turn it into standard form:
first equation:
y = x − 4
y - x = -4
second equation:
y = 3x + 4
y - 3x = 4
2. multiply the first equation by -3 and then add both equations in order to remove x.
-3y +3x = 12
+ y - 3x = 4
-2y = 16
y = -8
3. With y, plug it in the first equation.
-8 = x -4
x = -4
Your intercept is (-4, -8)
The answer is (−4, −8), because the point satisfies both equations
Answer:
6
Step-by-step explanation:
Quotient means divide. -72 / -12 = 6
Answer:]
At least 75% of the eruptions lasted between 1.24 and 5.6 minutes.
Step-by-step explanation:
We are given the following information in the question:
n = 32
Mean = 3.42
According to Chebyshev's rule:
At least , percent of data lies within , where s is the standadrd deviation of the data and is the mean of data.
For k = 2, we have
75% of data lies within the range of
Thus, at least 75% of the eruptions lasted between 1.24 and 5.6 minutes.
Y + 1 = -1/4(x - 5)
y + 1 = -1/4x + 5/4
y = -1/4x + 1/4
B. y = -1/4x + 1/4